Autophagy is a degradation process of cytoplasmic dysfunctional proteins and organelles. In this process, an isolation membrane composed of double membrane appear in cytosol, expands gradually, enfold with the aggregated proteins and damaged organelles, and close to form autophagosomes. The autophagosomes are fused with lysosomes to form autolysosomes in which are acidic environment. The contents in autolysosomes are decomposed by digestive enzymes in lysosomes. Since this cellular function is said to be related to aging as well as neurodegenerative diseases such as Parkinson’s disease, a simple autophagy detection method is being required.
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